Henry David Thoreau spread his beliefs through his writings, like Walden, it was a very important writing in transcendentalism. He also believed any government that violates morality for authority is a weak government.
Emerson and Thoreau were important transcendentalist which influenced the ideas of self reliance, civil disobedience, confidence, initiative and the importance of nature. Thoreau and Emerson were American transcendentalist who opposed any government who supported slavery.